What is the cheapest airline that flies from San Juan to London?

United Airlines, Delta, and JetBlue are the most popular carriers operating from San Juan to London

When did momondo last update prices for flights from San Juan to London?

Prices for flights from San Juan to London refresh daily.

How old do you have to be to fly from San Juan to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£264 Cheap Flights from San Juan to London in 2025/26

Q: What is the typical price of a round-trip flight between San Juan and London?

Prices are currently low for flights on this route. Typical prices usually range from £588 to £806. The lowest price recently found on this route was £405.

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Find the cheapest flights from San Juan to London

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

03:58 - 10:05

SJU

LGW

26h 07m1 stop

14:00 - 09:54

LGW

SJU

23h 54m1 stop

£405Multiple Airlines

Fri, 16 Jan - Sat, 24 Jan

21:25 - 19:00

SJU

LGW

17h 35m1 stop

11:45 - 19:55

LGW

SJU

12h 10m1 stop

£408Iberia

Thu, 22 Jan - Thu, 29 Jan

08:40 - 06:00

SJU

LGW

17h 20m1 stop

09:25 - 15:28

LGW

SJU

34h 03m2 stops

£409Multiple Airlines

Tue, 24 Feb - Sat, 28 Feb

07:45 - 07:30

SJU

LHR

19h 45m1 stop

10:00 - 06:11

LHR

SJU

24h 11m1 stop

£411Lufthansa

Wed, 18 Feb - Fri, 27 Feb

14:26 - 08:35

SJU

LHR

14h 09m1 stop

13:10 - 23:44

LHR

SJU

14h 34m1 stop

£413British Airways

Wed, 18 Feb - Thu, 26 Feb

02:05 - 20:35

SJU

LHR

14h 30m1 stop

08:30 - 22:22

LHR

SJU

17h 52m2 stops

£419United Airlines

Tue, 17 Feb - Thu, 26 Feb

07:30 - 08:45

SJU

LHR

21h 15m2 stops

10:10 - 23:58

LHR

SJU

17h 48m2 stops

£420Delta

Wed, 18 Feb - Thu, 26 Feb

15:55 - 11:40

SJU

LHR

15h 45m1 stop

15:50 - 13:06

LHR

SJU

25h 16m1 stop

£425KLM

Thu, 22 Jan - Thu, 29 Jan

01:00 - 08:35

SJU

LHR

26h 35m2 stops

17:50 - 21:24

LHR

SJU

32h 34m2 stops

£428United Airlines

Tue, 21 Apr - Mon, 27 Apr

15:40 - 11:20

SJU

LHR

15h 40m1 stop

13:25 - 13:55

LHR

SJU

28h 30m1 stop

£429Air Canada

Sat, 17 Jan - Sat, 24 Jan

KLM flights from San Juan to London

Our best KLM deals on San Juan to London flight tickets

KLM

22 Jan

SJU15:55San Juan Luis Munoz Marin Intl

15h 45m

1 stop

LHR11:40London Heathrow

29 Jan

LHR15:50London Heathrow

25h 16m

1 stop

SJU13:06San Juan Luis Munoz Marin Intl

£425

Find similar

KLM

15 Jan

SJU14:15San Juan Luis Munoz Marin Intl

14h 45m

1 stop

LHR09:00London Heathrow

22 Jan

LHR08:55London Heathrow

18h 50m

1 stop

SJU23:45San Juan Luis Munoz Marin Intl

£432

Find similar

KLM

15 Apr

SJU17:15San Juan Luis Munoz Marin Intl

15h 15m

1 stop

LHR13:30London Heathrow

20 Apr

LHR10:55London Heathrow

17h 48m

1 stop

SJU23:43San Juan Luis Munoz Marin Intl

£462

Find similar

United Airlines flights from San Juan to London

Our best United Airlines deals on San Juan to London flight tickets

United Airlines

17 Feb

SJU02:05San Juan Luis Munoz Marin Intl

14h 30m

1 stop

LHR20:35London Heathrow

26 Feb

LHR08:30London Heathrow

17h 52m

2 stops

SJU22:22San Juan Luis Munoz Marin Intl

£419

Find similar

United Airlines

21 Apr

SJU01:00San Juan Luis Munoz Marin Intl

26h 35m

2 stops

LHR08:35London Heathrow

27 Apr

LHR17:50London Heathrow

32h 34m

2 stops

SJU21:24San Juan Luis Munoz Marin Intl

£428

Find similar

United Airlines

15 Jan

SJU17:50San Juan Luis Munoz Marin Intl

13h 00m

1 stop

LHR10:50London Heathrow

22 Jan

LHR06:50London Heathrow

19h 32m

2 stops

SJU22:22San Juan Luis Munoz Marin Intl

£429

Find similar

Fly from

Fly to

Route

Depart

Return

Price

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Fri 16/1

03:58-10:05

1 stop26h 07m

London Gatwick

Sat 24/1

14:00-09:54

1 stop23h 54m

£405

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Thu 22/1

21:25-19:00

1 stop17h 35m

London Gatwick

Thu 29/1

11:45-19:55

1 stop12h 10m

£408

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Tue 24/2

08:40-06:00

1 stop17h 20m

London Gatwick

Sat 28/2

09:25-15:28

2 stops34h 03m

£409

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

07:45-07:30

1 stop19h 45m

London Heathrow

Fri 27/2

10:00-06:11

1 stop24h 11m

£411

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

14:26-08:35

1 stop14h 09m

London Heathrow

Thu 26/2

13:10-23:44

1 stop14h 34m

£413

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/2

02:05-20:35

1 stop14h 30m

London Heathrow

Thu 26/2

08:30-22:22

2 stops17h 52m

£419

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

07:30-08:45

2 stops21h 15m

London Heathrow

Thu 26/2

10:10-23:58

2 stops17h 48m

£420

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

15:55-11:40

1 stop15h 45m

London Heathrow

Thu 29/1

15:50-13:06

1 stop25h 16m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 21/4

01:00-08:35

2 stops26h 35m

London Heathrow

Mon 27/4

17:50-21:24

2 stops32h 34m

£428

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 17/1

15:40-11:20

1 stop15h 40m

London Heathrow

Sat 24/1

13:25-13:55

1 stop28h 30m

£429

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Juan to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between San Juan and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from San Juan is in February. Flight prices, which tend to average around £443, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from San Juan averaging around £477.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £495. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Juan to London for around £793.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £495. Flights in the morning are often more expensive, with an average ticket price of £858.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from San Juan when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £632 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from San Juan for as low as £479 on momondo.

Cheap San Juan to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Juan to London

Fastest flight time	12h 40m
Direct flights	None

The fastest flight from San Juan to London takes 12h 40m

There are no direct flights from San Juan to London. There are no popular flight routes from San Juan to London.

Search flight deals

How far is San Juan to London by plane?
San Juan and London are 4196.4 mi apart from one another. Flights usually cover this in 11h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from San Juan to London?
Prices for flights from San Juan to London refresh daily.
How old do you have to be to fly from San Juan to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Juan to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Hayes

Dover

Chelmsford

Colchester

Worthing

Bedford

Ramsgate

Hounslow

Stansted

Why use momondo?

Why should I use momondo to find a flight deal from San Juan to London?

It is quick and easy to find San Juan to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from San Juan to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Juan which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Juan to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Juan to London.

I’m not ready to book a flight from San Juan to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Juan to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.